16
STESkW ed 05/06
EOLO Star 23 kW
Technical Documentation
Technical Documentation
The possible functioning selections are:
= Circuit powered, the antifreeze and antiblock functions
are still active, the various post circulation and post ventilation
functions are completed.
( ) = Boiler operation in SUMMER.
( ) = Boiler operation in WINTER.
Functioning button
(S2)
Push button
The burner switches off when the safety temperature is exceeded
(105 °C).
It is located at the main exchanger outlet.
Safety thermostat
(E4)
Clicson
thermostat with
normally closed
contact
It lets the integrated board measure the temperature of the delivery
water in the primary circuit.
If it breaks the burner stops working whether in the central heating
or d.h.w. mode.
It is located on the central heating delivery pipe of the bithermal
exchanger.
Delivery probe
(B1)
NTC probe
10 kohm 25 °C
It lets the integrated board measure the outlet temperature of the
domestic hot water.
If it breaks, functioning in the d.h.w. mode is stopped but function-
ing in the central heating mode is allowed.
It is inserted in the d.h.w outlet pipe connected to the bithermal
exchanger.
D.h.w. probe
(B2)
NTC probe
10 kohm 25 °C
It is powered by the integrated board with a variable continuous current.
It permits varying of the gas pressure to the burner.
Gas valve modulation coil
(Y2)
Loads.
It enables operation in the central heating mode when room tem-
perature is below that required.
If this room thermostat is installed the X40 jumper must be re-
moved.
Room thermostat (S20)
(external optional)
Interrupted
contact
It unblocks the boiler following either the ignition failure or over-
temperature safety device triggering; it can be used to activate the
chimney sweep function.
If pressed together with the functioning button (S2) it lets you
access the boiler parameter settings.
Reset push button
(S3)
Push button
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Summary of Contents for EOLO Star 23 kW
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